Static Primary Water Switch (pressure)
This is an extract from our Combination Boiler Handbook.
Primary water exerts pressure underneath the diaphragm to operate a switch. This
informs the boiler that there is enough pressure in the primary circuit for
safe operation.
A typical static primary water switch
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Static Primary Water Switch Problems
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Components Section
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Symptom:
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Indication
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Possible fault
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Remedy
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No heating or hot water.
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Neon lit on boiler indicating low pressure.
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System pressure low
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Top up on filling loop and check for leaks.
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Faulty Switch - replace.
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System pressure OK (1 bar or above).
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Loose electrical connection.
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Blockage - water side of diaphragm.
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Example boiler types: Baxi 80E. Ariston Baracoussi. Ideal Response. Ferroli.
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